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Some crocodiles are seen at Asam Kumbang breeding in Medan, North Sumatera, Indonesia. Sept. 17, 2017. Photo: Xinhua.

Some crocodiles are seen at Asam Kumbang breeding in Medan, North Sumatera, Indonesia. Sept. 17, 2017. Photo: Xinhua.

A red swamp crayfish (Procambarus clarkii) is pictured near the lake 'Neuen See' in Berlin Tiergarten on August 25, 2017. The recent proliferation of red swamp crayfish in Berlin, a species classified as invasive and harmful, worries specialists who warn about the damage it could cause to the ecosystems of the German capital. Photo: AFP.

Baby elephant Edgar splashes around as he bathes with family members in a pool of his enclosure at the Tierpark zoo in Berlin on August 10, 2017. Photo: AFP

People gather blueberries at a plantation in the village of Vysokoe, some 290 km south of Minsk, on July 31, 2017. Photo: AFP

A dolphin jumping during the new night show at the Marineland on the French riviera city of Antibes, southeastern France. Photo: AFP

A rainbow occurs in the grey sky over pastures of the Allgaeu region near Aitrang, southern Germany, on July 24, 2017. Photo: AFP

Smoke billows during a forest fire in La Croix-Valmer, near Saint-Tropez, on July 25, 2017 as firefighters keep on battling blazes across southern France. Photo: AFP

Bees collect pollen from a sunflower on July 25, 2017 near Bergheim, western Germany.Photo: AFp

Lava flows from the Piton de la Fournaise, the volcano of the French Indian Ocean island of Reunion, which erupted early on July 14, 2017 according to the Piton de la Fournaise volcano observatory (OVPF). Photo: AFP

Lava erupts from the Piton de la Fournaise, the volcano of the French Indian Ocean island of Reunion, which erupted early on July 14, 2017 according to the Piton de la Fournaise volcano observatory (OVPF). Photo: AFP

Lava erupts from the Piton de la Fournaise, the volcano of the French Indian Ocean island of Reunion, which erupted early on July 14, 2017 according to the Piton de la Fournaise volcano observatory (OVPF). Photo: AFP

Lava errupts from the Piton de la Fournaise, the volcano of the French Indian Ocean island of Reunion, which erupted early on July 14, 2017 according to the Piton de la Fournaise volcano observatory (OVPF). Photo: AFP

Untreated liquid wastes are being dumped into the Karnapara canal, which connects the river Dhaleswari, polluting water of the river in Savar. Photo: Daily Sun

Aerial view of a forest area consumed by a massive fire and now being sowed by dogs in Talca, about 350 kilometres south of Santiago on June 23, 2017. Photo: AFP

A Bangladeshi villager sits amid the desbris of a house destroyed by Cyclone Mora in Cox's Bazar on May 31, 2017. Photo: AFP

Bangladeshi villagers stand next to a house destroyed by Cyclone Mora in Cox's Bazar on May 31, 2017. Photo: AFP

A Rohingya refugee sits near a house destroyed by Cyclone Mora in a camp in the Cox's Bazar district on May 31, 2017. Photo: AFP

Rohingya refugees rebuild their house, which was destroyed by Cyclone Mora, at a camp in the Cox's Bazar district on May 31, 2017. Photo: AFP

A Rohingya refugee sits near a house destroyed by Cyclone Mora in a camp in the Cox's Bazar district on May 31, 2017. Photo: AFP

Fishermen collect eggs from the river Halda, a major sweetwater fish breeding ground, in Chittagong on Saturday as indigenous sweetwater fishes have released eggs. (Inset), a palm full of fish eggs. - Md Rajib Raihan

A mango tree starts budding on Dhaka University campus while it is still winter. The photo was taken on Sunday. Photo: Ratan

Women work at a dry fish yard in the Bangladeshi coastal resort of Cox’s Bazar

Women work at a dry fish yard in the Bangladeshi coastal resort of Cox’s Bazar